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Julien Thébault, Hana Uvanović, Erwan Amice, Laurent Chauvaud, Melita Peharda |
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Title |
Influence of sea-ice dynamics on coastal Antarctic benthos: A case study on lantern clams (Laternula elliptica) in Adélie Land |
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2023 |
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Marine environmental research |
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192 |
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106220 |
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Benthic-pelagic coupling Clams East Antarctica Food source Growth Ice Master chronology Sclerochronology Sympagic algae |
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Polar regions are warming faster than the world average and are profoundly affected by changes in the spatio-temporal dynamics of sea ice, with largely unknown repercussions on the functioning of marine ecosystems. Here, we investigated the impacts of interannual sea-ice variability on coastal benthic communities in Antarctica, focusing on a close-to-pristine area (Adélie Land). We investigated shell growth of the circum-Antarctic bivalve Laternula elliptica, considered a key species in these soft bottom benthic communities. Chondrophores of live-collected clams were prepared using standard sclerochronological methods to study the interannual variability of shell growth from 1996 to 2015. Our results show that the master chronology varied with sea-ice dynamics. When sea ice breaks up too early, sympagic algae do not have time to accumulate sufficiently high biomass, thus strongly limiting the energy input to the benthos. This negatively affects the physiological performance of L. elliptica, thereby altering their population dynamics and hence the functioning of these soft-bottom ecosystems. |
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0141-1136 |
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8661 |
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Frapin, C., Albouy, C., Gilg, O., Christin, S., Angerbjörn, A., Fauteux, D. &Amp; Lecomte, N. |
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Modeling the seasonal Arctic terrestrial trophic network |
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2022 |
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Atlantic society of fish and wildlife biology annual meeting. fredericton, nb, canada (14-16 october 2022) |
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Frapin, C., Albouy, C., Christin, S., Fauteux, D., Angerbjörn, A., Gilg, O. & Lecomte, N. |
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Modeling the seasonal Arctic terrestrial trophic network |
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2022 |
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Arcticnet annual scientific meeting 2022, Toronto, Canada, 5-8 décember 2022 |
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8659 |
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Gilg, O., Hansen, L.H., Schmidt, N.M., Lang, J., Sittler, B., Sokolov, A., Sokolova, N., Fufachev, I., Ehrich, D., Forin-Wiart, M.-A., Bédard, A., Lecomte, N., Sabard, B., Pletenev, A., Gilg, V., Sabard, C., Meyer, N., Berteaux, D. & Bollache, L. |
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Predator-prey interactions between the arctic fox and tundra nesting birds in space and time: first results of an ongoing circumpolar initiative |
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2022 |
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6th international conference in Arctic Fox Conference 2022, 26-29 August 2022, Longyearbyen, Svalbard |
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8658 |
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Frapin, C., Albouy, C., Gilg, O., Christin, S., Angerbjörn, A., Fauteux, D. & Lecomte, N. |
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Modeling the seasonal Arctic trophic network and the centrality of the Arctic fox |
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2022 |
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6th international conference in Arctic Fox Conference 2022, 26-29 August 2022, Longyearbyen, Svalbard |
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1036 |
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8657 |
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Ungar, P.S., Van Valkenburgh, B., Peterson, A.S., Sokolov, A.A., Sokolova, N.A., Ehrich, D., Fufachev, I.A., Gilg, O., Terekhina, A., Volkovitskiy, A. & Shtro, V. |
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Dental ecology reflects diet in arctic foxes |
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2022 |
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6th international conference in Arctic Fox Conference 2022, 26-29 August 2022, Longyearbyen, Svalbard |
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8656 |
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Jouanneau W.; Léandri-breton D-j.; Herzke D.; Moe B.; Nikiforov V. A.; Pallud M.; Parenteau C.; Gabrielsen G. W.; Chastel O. |
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Maternal transfer of contaminants and endocrine disruption in an Arctic seabird |
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Peer-reviewed symposium |
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2021 |
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5th animal ecophysiology seminar “cepa5” 2021 – november 2-4 – montpellier, france |
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8655 |
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Sokolova, N., Fufachev, I., Ehrich, D., GIlg, O., Shklyar, K., Filipova, V. & Sokolov, A. |
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“The Arctic Fox” project in Sabetta (Yamal Peninsula, Russia) |
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Peer-reviewed symposium |
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2022 |
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6th international conference in Arctic Fox Conference 2022, 26-29 August 2022, Longyearbyen, Svalbard |
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8654 |
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Author |
Unnikrishnan A. S., A. Matthews, M. Gravelle, L. Testut, T. Aarup, P. L. Woodworth and B. A. Kumar. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Tide gauges. In: Beal, Lisa M.; Vialard, Jérôme; Roxy, Mathew K., (eds.) Full Report. IndOOS-2: A roadmap to sustained observations of the Indian Ocean for 2020-2030 |
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2019 |
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Clivar/ioc-goos indian ocean region panel (iorp), |
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31-34 |
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Tide gauge measurements provide data for routine tidal predictions in ports as well as for extreme events such as storm surges and tsunamis. Along with satellite altimeter measurements, tide gauges also provide measurements used for sea-level rise estimates. This is particularly important for impact assessment in low-lying coastlines of south Asia as well as islands such as the Maldives in the Indian Ocean. |
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8653 |
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Philippe Ricaud, Massimo Del Guasta, Angelo Lupi, Romain Roehrig, Eric Bazile, Pierre Durand, Jean-Luc Attié, Alessia Nicosia, Paolo Grigioni |
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Title |
Supercooled liquid water clouds observed over Dome C, Antarctica: temperature sensitivity and surface radiation impact |
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2022 |
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Atmospheric Chemistry and Physics Discussions |
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1-38 |
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Clouds affect the Earth climate with an impact that depends on the cloud nature (solid/ liquid water). Although the Antarctic climate is changing rapidly, cloud observations are sparse over Antarctica due to few ground stations and satellite observations. The Concordia station is located on the East Antarctic Plateau (75° S, 123° E, 3233 m above mean sea level), one of the driest and coldest places on Earth. We used observations of clouds, temperature, liquid water and surface radiation performed at Concordia during 4 austral summers (December 2018–2021) to analyze the link between liquid water and temperature and its impact on surface radiation in the presence of supercooled liquid water (liquid water for temperature less than 0 °C) clouds (SLWCs). Our analysis shows that, within SLWCs, temperature logarithmically increases from -36.0 °C to -16.0 °C when liquid water path increases from 1.0 to 14.0 g m-2, and SLWCs positively impact the net surface radiation, which logarithmically increases by 0.0 to 50.0 W m-2 when liquid water path increases from 1.7 to 3.0 g m-2. We finally estimate that SLWCs have a great potential radiative impact over Antarctica whatever the season considered, up to 5.0 W m-2 over the Eastern Antarctic Plateau and up to 30 W m-2 over the Antarctic Peninsula in summer. |
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